Component level xBuddy repair: diode D37, "150"
On the off chance someone else does component level repairs: My xBuddy board FDM-MK4-xBuddy blew F1, which feeds power to the extruder nozzle. With F1 removed, there showed a dead short from the output end of that fuse holder to ground/common. This persisted with the output disconnected. There doesn't appear to be a schematic available online. I figured the problem would be a shorted part, most likely a diode or capacitor. Could see D37 connected apparently as a "catch" diode directly to the output terminal of F1. Pulled up one end of F1, and sure enough, it's shorted. It appears to be a Diodes Inc part, labeled simply "150". So far, I haven't found a Diodes Inc part whose data sheet claims that as a marking: I do find B150 called out for Schottky 1A, 50V SMA-size. If nobody can help with a better match, I'll just try the B150, or perhaps the 3-A rated B350 which might be a bit more robust in this application. Comments welcome, of course.
RE: Component level xBuddy repair: diode D37, "150"
You can find the X-Buddy schematic here:
https://www.prusa3d.com/downloads/Electronics_drawings/FDM-xBUDDY-44.pdf
Strangely enough, it's on the Prusa website, but who would look for it there, right?
RE: Component level xBuddy repair: diode D37, "150"
The diode in question is an ESD protection diode of the type SMAJ28A-13-F. Find the rest yourself.